(19)
(11) EP 0 746 715 A1

(12)

(43) Date of publication:
11.12.1996 Bulletin 1996/50

(21) Application number: 93901475.0

(22) Date of filing: 09.12.1992
(51) International Patent Classification (IPC): 
F04D 15/ 00( . )
G05D 7/ 06( . )
F16K 37/ 00( . )
G05D 16/ 20( . )
(86) International application number:
PCT/US1992/010727
(87) International publication number:
WO 1994/010489 (11.05.1994 Gazette 1994/11)
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

(30) Priority: 27.10.1992 US 19920967227

(71) Applicant: KEYSTONE INTERNATIONAL HOLDINGS CORP.
Houston Texas 77040 (US)

(72) Inventor:
  • KALIX, David, A.
    Philadelphia, PA 19120 (US)

(74) Representative: Berkenfeld, Helmut, Dipl.-Ing. 
An der Schanz 2
50735 Köln
50735 Köln (DE)

   


(54) METHOD AND APPARATUS FOR MONITORING RECIRCULATION CONTROL SYSTEM PERFORMANCE